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Optical image stabilizing system using fuzzy sliding-mode controller for digital cameras

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3 Author(s)
Li, T.S. ; Dept. of Electr. Eng., Nat. Cheng Kung Univ., Tainan, Taiwan ; Ching-Chang Chen ; Yu-Te Su

An optical image stabilizing (OIS) system using fuzzy sliding-mode controller (FSMC) is presented in this research. The OIS system shifts the image sensor to correct the deviation from the optical path caused by a user's handshake vibration. The voice coil motors (VCM) was adopted to drive the OIS module which bears the image sensor, a gyroscope was used to detect the hand-shake vibration, and two single-axis hall sensors were designed to sense the position of the VCM actuators. The proposed FSMC overcomes the nonlinear, hysteresis, and time-varying properties of the VCM actuator efficiently. The stabilizing performance was demonstrated by digital photographs taken under different test conditions.

Published in:

Consumer Electronics, IEEE Transactions on  (Volume:58 ,  Issue: 2 )